[Carl] just found a yet another use for the RTL-SDR. He’s been decoding Inmarsat STD-C EGC messages with it. Inmarsat is a British satellite telecommunications company. They provide communica… ...

Using cheap RTL-SDR dongles and Python, [Eric Urban] was able to compare the performance of two shortwave/HF antennas, and documented the entire process.

The tutorial takes you through everything you need including setting up your Raspberry Pi 3 mini PC attaching the RTL-SDR V3 software defined radio dongle and the dipole antenna suitable for 137 ...